Revert "UBUNTU: SAUCE: (noup) netfilter: x_tables: check for size overflow"

This reverts commit 7da29bde.

Dropping this SAUCE patch and replacing it by the upstream fix for
CVE-2016-3135:

  d157bd76 "netfilter: x_tables: check for size overflow"

The original fix (being reverted) was modified to keep only the 2nd check.

https://marc.info/?l=netfilter-devel&m=145778004016206&w=2Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>

net/netfilter/x_tables.c

@@ -898,9 +898,6 @@ struct xt_table_info *xt_alloc_table_info(unsigned int size)
 	struct xt_table_info *info = NULL;
 	size_t sz = sizeof(*info) + size;
 
-	if (sz < size || sz < sizeof(*info))
-		return NULL;
-
 	/* Pedantry: prevent them from hitting BUG() in vmalloc.c --RR */
 	if ((SMP_ALIGN(size) >> PAGE_SHIFT) + 2 > totalram_pages)
 		return NULL;